2009 Sierra door lock problem

My 2009 1500 Sierra SLE 4WD driver side door lock does not work. The electric lock control will not work either door, nor does the key fob lock/unlock driver door. So I have to manually push down door lock and use key to unlock/open driver door. Passenger side works fine. Someone mentioned door actuator, can't seem to locate this part online for sale. Any suggestions?

It sounds like a power problem, you said you checked the fuse, so maybe it's the wire providing power to the control module inside the door.
Sometimes, the wires will break in the wire bundle going to the door. There is a lot of flex from the door opening, or closing.
If nothing on the door works (windows, mirror, etc), it could be a broken ground wire.

Everything else on the door works, windows & mirrors. When I push the lock/unlock button it makes a buzzing noise, like it wants to work. The door lock moves @ 1/8". When using the passenger lock button it also moves slightly.

In my 09 both of my lock actuators went bad last fall at separate times. I actually just installed two new actuators Monday of this week. I wish I had the part numbers but I do not, I called my local dealership and gave them the VIN and had them order the kit. I removed both door panels and swapped out the old for the new. Everything works perfect again (key fob, lock buttons and manual lock). It was quite the pain in the @$$ to get to but a fairly quick job. Just be prepared for busted knuckles. Cost me approx. $250 for both doors. I've read in a couple forums that this is a somewhat typical problem on the NNBS trucks.

My 2009 1500 Sierra SLE 4WD driver side door lock does not work. The electric lock control will not work either door, nor does the key fob lock/unlock driver door. So I have to manually push down door lock and use key to unlock/open driver door. Passenger side works fine. Someone mentioned door actuator, can't seem to locate this part online for sale. Any suggestions?

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if the passenger door locks / unlocks ok with the switch control but the driver door does not work then it is the wiring going to the actuator or the actuator. open the driver door panel and with meter measure the volts across the actuator when hiting the switch see if there is power going to the driverdoor actuator if the power is there when you hit switch and no action then you got a defective actuator.